<!--除登录页面以外，所有页面的父级页面，编写共有的左侧菜单栏与头部-->

<template>
  <!--  display:flex 给父容器使用弹性布局可以使所有子元素横置靠左排列-->
  <div style="display:flex">
    <div :style="{width:(isCollapse ? '64px' : '208px')}">
      <!--  左侧菜单栏  -->
      <el-menu
          background-color="#3c82f5"
          text-color="#fff"
          active-text-color="#ff0"
          style="width: 100%;height: 100vh"
          :collapse="isCollapse"
          unique-opened
          router
          :collapse-transition="false"
          @select="selectMenu"
      >
        <el-row style="padding-top: 10px">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 7px">
            <el-avatar src="/imgs/admin/logo.png" style="width:35px;height: 35px;"></el-avatar>
          </el-col>
          <el-col :span="isCollapse ? 0 : 13">
            <router-link to="/" style="color: #fff;font-weight: bold ;text-decoration: none;
            position:relative;top:8px;left:2px">智慧车辆
            </router-link>
          </el-col>
        </el-row>
        <el-sub-menu index="1">
          <template #title>
            <el-icon style="font-size:21px">
              <User/>
            </el-icon>
            <span>用户管理</span>
          </template>
          <el-menu-item index="/user">用户列表</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="2">
          <template #title>
            <el-icon style="font-size:21px">
              <Van/>
            </el-icon>
            <span>车辆管理</span>
          </template>
          <el-menu-item index="/vehicle">基本信息</el-menu-item>
        </el-sub-menu>


        <el-sub-menu index="3">
          <template #title>
            <el-icon style="font-size:21px">
              <Location/>
            </el-icon>
            <span>电子围栏</span>
          </template>
          <el-menu-item index="/geofence">围栏管理</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="4">
          <template #title>
            <el-icon style="font-size:21px">
              <Place/>
            </el-icon>
            <span>调度管理</span>
          </template>
          <el-menu-item index="/application">申请列表</el-menu-item>
          <el-menu-item index="/audit">调度审核</el-menu-item>
          <el-menu-item index="/distribute">车辆分配</el-menu-item>
        </el-sub-menu>

        <el-sub-menu index="5">
          <template #title>
            <el-icon style="font-size:21px">
              <MessageBox/>
            </el-icon>
            <span>数据字典</span>
          </template>
          <el-menu-item index="/dict">字典管理</el-menu-item>
        </el-sub-menu>
      </el-menu>
    </div>
<!--   错误代码 :style="{width:(isCollapse ? 'calc(100% - 64px)' : 'calc(100%-208px)')}"-->
    <div :style="{ width:(isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px)')}">

      <!--   顶部菜单栏   -->
<el-header style="height:10vh;background-color:#fff;padding-top:22px;">
  <el-row>
    <el-col :span="18">
      <el-icon style="font-size: 20px;" @click="changeCollapse"><Expand/></el-icon>
    </el-col>
    <el-col :span="6" style="position: relative">
      <el-dropdown style="position: absolute;right: 20px;">
    <span style="font-size: 19px;font-weight: bold;">
      {{user.username}}
      <el-icon><arrow-down /></el-icon>
    </span>
        <template #dropdown>
          <el-dropdown-menu>
            <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
          </el-dropdown-menu>
        </template>
      </el-dropdown>
    </el-col>
  </el-row>
<!-- 面包屑导航 -->
  <el-breadcrumb separator="/" style="position:relative;top:30px">
    <el-breadcrumb-item>首页</el-breadcrumb-item>
    <el-breadcrumb-item v-for="item in breadcrumb">{{ item }}</el-breadcrumb-item>
  </el-breadcrumb>
</el-header>


      <!--    右侧主题菜单栏   -->
<el-main style="height: 90vh;padding:0;overflow-y:auto;">

  <router-view/>
</el-main>

    </div>
  </div>
  <!--   可变区域 -->

</template>

<script setup>
import {ref} from "vue";
// 定义变量控制菜单是否折叠
const isCollapse = ref(false);

const changeCollapse = () => {
  isCollapse.value = !isCollapse.value;
}

//获取当前登录的用户对象
const user = ref(getUser());

//定义退出登录功能
const logout=()=>{
  if(confirm('确定退出登录')){
    //清空存的用户数据+面包屑数据
    localStorage.removeItem('user');
    localStorage.removeItem('breadCrumb');
    window.location.href='/login';
    //也要把已经取出来的user数据清空
    user.value='';
  }
}

//定义面包屑数组的显示值
const breadcrumb = ref(JSON.parse(localStorage.getItem('breadCrumb')) ||['用户管理','用户列表']);
//定义集合用来维护页面路径与面包屑的对应关系
let map = {
  "/user":['用户管理','用户列表'],
  "/vehicle":['车辆管理','基本信息'],
  "/geofence":['电子围栏','围栏管理'],
  "/application":['调度管理','申请列表'],
  "/audit":['调度管理','调度审核'],
  "/distribute":['调度管理','车辆分配'],
  "/dict":['数据字典','字典管理']
}
//只要选择了菜单项，就切换面包屑的值
const selectMenu =(index)=>{
  breadcrumb.value = map[index];
  //解决面包屑丢失问题，每次切换页面时，将当前对应的面包屑值存入localStorage中
  localStorage.setItem('breadCrumb',JSON.stringify(breadcrumb.value));
}
</script>
